exchange tracking logs recipient empty

I have just been given a set of message tracking logs (from a 2010 exchange server) and this is the first time I have dealt with such logs. The logs seem to be in comma separated format, so I have imported one of the logs into excel to see what information they give you. However one thing I noticed, is the recipient address is always empty in every row of data! Is this normal? The sender address is always populated, but it only seems to be that of internal employees. I was hoping the logs would have information coming into and going out of the organisation, i.e. external email addresses as well. Do these logs not work in that way?
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pma111Asked:
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Andy MInternal Systems ManagerCommented:
It would depend on how the logs were exported as there's many different switches to include/exclude specific data. In 2010 the message tracking logs can be viewed/searched within the Exchange Management Console itself if you need to double check them.

Tracking logs include everything (external and internal traffic) within them so it sounds like it has been filtered during the export.

This may help in exporting the logs: http://blogs.technet.com/b/exchange/archive/2008/12/01/3406581.aspx
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pma111Author Commented:
Its weird because the field is there, there are a number of fields included in the reports that dont actually have any data in them. As far as I know the logs were simply copied of the file system, so its not like they could filter them out.
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Rajitha ChimmaniCommented:
Would you copy a sample file here? It all depends on what properties were included while exporting and what was the input command given to extract the logs
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Andy MInternal Systems ManagerCommented:
I have seen before that the export to csv doesn't always copy the information required, hence I always have a look at Exchange's own tracking log explorer if there appears to be something missing on the csv. If the information is also missing on the tracking log explorer then it would indicate a problem (maybe corruption) on the logs themselves.
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pma111Author Commented:
No export was done the raw log files were copied from a backup
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pma111Author Commented:
Confidentiality means unfortunately cant upload a sample
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